Ghostscript is a processor for PostScript and PDF files. It can rasterize these files to a wide variety of printers, devices for screen preview, and image file formats. Since applications tend to prepare pages for printing in a high-level format such as PostScript, most Unix users with low-level bitmap printers, such as inkjets, use GhostScript as part of the printing process. In addition, Ghostscript is capable of converting PostScript files, functionality comparable to Adobe Acrobat Distiller, but on the command line. In addition, Ghostscript is used for file import and viewing by a great many other applications, including xv, ImageMagick, gimp, and xdvi. Several GUI wrappers for viewing PostScript and PDF files exist, including GSview, ghostview, gv, ggv, and kghostview. This is far from a comprehensive list.

album is a free HTML/XHTML photo album and gallery
generator that supports themes/skins. You can
choose different themes or write your own to get
different layouts and styles. It creates all your
thumbnails (including directory thumbnails) and
descends into directories so you can organize your
photos. See the home page for more examples. album
is also multi-lingual, with many languages being
added all the time. N.B.: The purchase link is
provided for donations; the software does not cost
anything.

BRL-CAD is a powerful constructive solid geometry solid modeling system that includes an interactive geometry editor, ray-tracing support for rendering and geometric analysis, path-tracing for realistic image synthesis, network distributed framebuffer support, and image and signal-processing tools.

ChBg is for changing desktop backgrounds in a given period. It can render images with 10 modes (such as tiled, centered, scaled, etc.). It uses Imlib1, Imlib2, or gdk_pixbuf for loading images, so it supports many image formats. ChBg has a windowed setup program, is able to load setup files, can be used as slideshow picture previewer in its own window or as a desktop background, and can be used as screensaver or as an xscreensaver hack. It has a dialog for fast previewing of pictures and very usable thumbnail previews.

Coin is an implementation of Open Inventor. Open Inventor is the de facto standard API for retained-mode 3D graphics programming. Open Inventor has a highly extensible design, and has been designed to allow for rapid development of highly interactive 3D graphics applications in the fields of CAD, engineering, scientific computing, simulation, VRML, and visualization.

Cult3D is the new multi-platform 3D object rendering engine. It's a technological breakthrough that's 100% software. No additional hardware like 3D accelerator cards are required. As a desktop or notebook user you can now view 3D objects in realtime, a feature formerly found only on expensive workstations. And Cult3D gives all Internet users the opportunity to see high-quality 3D objects on-line on many platforms.

dphotox extracts the ExIf information in the JPEG images produced by digital still cameras running the Digita operating system. The ExIf information includes the date & time of capture, exposure values, the sound note (WAV file), and thumb/screen nail versions of the image.